PDF malware analysis — malicious · 4dd3464c7ee698b6

MALICIOUS

PDF

78.9 KB Created: 2021-04-19 04:42:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22

MD5: fb4551873b0a799e8beb1b7ffc0f60c0 SHA-1: d388cdf2ecf13d800d0b9536fbc6b2209f5abe91 SHA-256: 4dd3464c7ee698b68c256164f6470f94b8ea1c1dabac37c572c819dc71769165

244 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, specifically flagging it as a redirector link farm and a phishing trojan. The document contains a large number of embedded URLs, many of which point to disposable hosting or known redirector infrastructure, suggesting an attempt to distribute malicious content or phish users. No scripts were extracted from this sample.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL https://yafferge.ru/strik?utm_term=how+to+do+a+newspaper+interview In PDF document text
- https://cdn.sqhk.co/metusoteliza/ZRzrEia/battery_tender_charger_motorcycle.pdfIn PDF document text
- https://povutepumik.weebly.com/uploads/1/3/2/7/132741486/e0baf.pdfIn PDF document text
- http://zimejitudik.iblogger.org/apprendre_le_russe_gratuitement.pdfIn PDF document text
- https://gelasinez.weebly.com/uploads/1/3/4/7/134763890/gawugoruro-piwozukojat.pdfIn PDF document text
- http://dupipavigojas.iblogger.org/47084192083.pdfIn PDF document text
- https://jasumiwadujavik.weebly.com/uploads/1/3/2/7/132741590/luluwuvi.pdfIn PDF document text
- https://vapevaka.weebly.com/uploads/1/3/1/4/131407737/zosijogula.pdfIn PDF document text
- https://cdn.sqhk.co/boxepupovemu/dHhegf4/wazinuzadej.pdfIn PDF document text
- https://kixarazebeda.weebly.com/uploads/1/3/0/7/130776474/5264795.pdfIn PDF document text
- https://cdn.sqhk.co/bepoweruga/Ijc8Dhj/wukufepetapomunozadosu.pdfIn PDF document text
- https://rumodabumuxe.weebly.com/uploads/1/3/1/8/131857513/134267b6a64573.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- http://zodazuwofapodu.epizy.com/explain_blastula_formation.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4b34606a-4400-403b-9aca-5a7a3b0f83c5/35063990074.pdfIn PDF document text
- http://nononowixumutu.rf.gd/best_annotation_ipad_apple_pencil.pdfIn PDF document text
- http://suvowafavij.epizy.com/trabajo_adiabatico.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/cb1938d0-1138-4ad2-96ee-ad84c18200f7/7303512502.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/1ae6809b-cf50-4378-ad95-7b7187718838/17429072562.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e807.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE807	4820 bytes
SHA-256: `93decfbc4069fb41d3f00bf8c57c346678e10ab84a9541bb21aa2d51616e57c0`
`font_01_sfnt_off0000f887.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF887	11568 bytes
SHA-256: `c5fbbafdb0ff12db12d75c9ab67b3fda8038d48c3a49e4b07b6feeba644835e8`
`font_02_sfnt_off00011fd9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11FD9	4324 bytes
SHA-256: `ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230`

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